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如图,点A、B、C在⊙O上,∠ACB=30°,则sin∠AOB的值是( ) A....
如图,点A、B、C在⊙O上,∠ACB=30°,则sin∠AOB的值是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837838703/SYS201311011941078378387005_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837838703/SYS201311011941078378387005_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837838703/SYS201311011941078378387005_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837838703/SYS201311011941078378387005_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101194107837838703/SYS201311011941078378387005_ST/3.png)
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